RU2747131C1 - User terminal, base station and radio communication method - Google Patents

Abstract

FIELD: radio communication.

SUBSTANCE: invention relates to a terminal and a radio communication method. The method receives a downlink shared channel that is scheduled by downlink control information; and controlling the transmission of a Hybrid Automatic Repeat Request (HARQ-ACK) acknowledgment based on slot information corresponding to a plurality of potential HARQ-ACK transmission intervals for the downlink common channel and slot configuration information indicating the transmission direction of each slot, wherein the HARQ-ACK transmission interval indicated by the downlink control information is at least one of the slots corresponding to the plurality of potential transmission intervals.

EFFECT: technical result consists in increasing the efficiency of radio communication control.

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Description

The technical field to which the invention relates

[0001] The present invention relates to a user terminal, a base station, and a radio communication method in next generation mobile communication systems.

State of the art

[0002] In the Universal Mobile Telecommunications System (UMTS) network, LTE (Long Term Evolution) scheme specifications have been developed to further increase high-speed data rates, reduce data transmission latency, etc. etc. (see Non-Patent Literature Document 1). Currently under study are next generation LTE systems (also referred to as, for example, LTE-A (LTE-Advanced), FRA (Future Radio Access), 4G, 5G, 5G + (plus), NR (New RAT, New Radio Access Technology), LTE Version 14, Version 15 (or later), etc.).

[0003] In known LTE systems (eg, LTE Release 13 or earlier), downlink (DL) and / or uplink (Uplink. UL) communications are performed with a transmission time slot (Eng. transmission time interval, TTI) (also called subframe, etc.) of 1 millisecond. A transmission time interval of 1 millisecond is a unit of transmission time for one channel-coded data packet, as well as a processing unit in processes such as scheduling, channel adaptation, and retransmission control (HARQ-ACK (Hybrid Automatic Repeat reQuest-Acknowledge) hybrid automatic retransmission request)), etc. A 1 millisecond transmission time interval includes two slots.

[0004] In known LTE systems, the transmission time reference is taken to be a fixed value of 4 milliseconds, taking into account, for example, the signal processing time at the user terminal and / or the radio base station, and based on this, the transmission time is controlled to control the retransmission of information ( which is also referred to as, for example, ACK / NACK, A / N (acknowledgment / negative acknowledgment), HARQ-ACK (hybrid automatic retransmission request acknowledgment), etc.) for the downlink common channel (for example, PDSCH ( Physical Downlink Shared Channel), hereinafter referred to as "physical downlink shared channel").

[0005] For example, in Frequency Division Duplex (FDD) mode for known LTE systems, if the physical downlink common channel (or downlink data) arrives in subframe # n, transmitting (in the opposite direction) acknowledgment / negative the acknowledgment for the physical downlink common channel occurs in subframe # n + 4, assuming that the processing time or similar time for the physical downlink common channel in the user terminal is 4 milliseconds. In TDD (Time Division Duplex) mode, if the physical downlink shared channel arrives in the downlink subframe # n, the acknowledgment / negative acknowledgment for the physical downlink common channel is transmitted in the upstream subframe after subframe # n + 4 according to the uplink configurations. / downlinks, etc., for example, assuming that the processing time for the physical downlink common channel in the user terminal is 4 milliseconds.

[0006] In existing LTE systems, the user terminal transmits uplink control information (UCI), including acknowledgments / negative acknowledgments, etc., via an uplink data channel (for example, a PUSCH type channel). Physical Uplink Shared Channel) and / or an uplink control channel (for example, such as PUCCH (Physical Uplink Control Channel).

Bibliography

Non-Patent Literature Document

[0007] Non-Patent Literature Document 1: 3GPP TS 36.300 V8.12.0 "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)," April , 2010 ("Enhanced Universal Terrestrial Radio Access (E-UTRA) and Enhanced Universal Terrestrial Radio Access Network (E-UTRAN); General Description; Stage 2 (Version 8)", April 2010).

Disclosure of the essence of the invention

Technical problem

[0008] The possibility of flexible scheduling control of the data channel (including downlink data channel and / or uplink data channel, which is also referred to simply as "data", etc.) for a future radio communication system (eg, LTE Release 14 and later, 5G, NR, etc.). For example, learning how to make the transmission interval and / or data transmission period (hereinafter also referred to as "transmission interval / transmission period") variables for each scheduling event (variable length). It is also being explored how the transmission interval / transmission period of the acknowledgment / negative acknowledgment for data transmission can be made variable for each acknowledgment / negative acknowledgment transmission.

[0009] In existing LTE systems, the acknowledgment / negative acknowledgment response is controlled based on predetermined transmission intervals. In a radio communication system with the ability to change the transmission interval for each acknowledgment / negative acknowledgment transmission, control of the acknowledgment / negative acknowledgment transmission (e.g., multiplexing, etc.), as in the case of prior art LTE systems, may prevent flexible control of each acknowledgment / negative acknowledgment transmission, and , as a result, deteriorate the quality of communication.

[0010] The present invention has been developed in view of the above and aims to provide a user terminal, a base station, and a radio communication method capable of communicating properly even when the transmission interval / transmission period for retransmission control information is flexibly controlled (it is variable).

Solution to the problem

[0011] An aspect of the proposed user terminal includes a transmission section capable of transmitting retransmission control information for downlink transmission and a control section capable of controlling transmission of retransmission control information at specific intervals reported from a base station. The time window is configured for the retransmission control information, wherein the control section controls transmission of the retransmission control information based on the specified determined intervals and the time window configured for the retransmission control information, wherein at least one of the determined intervals falls within the time window.

Benefits of the invention

[0012] Proper communication of the present invention is possible even when the transmission interval / transmission period for the retransmission control information is flexibly controlled (it is variable).

Brief Description of Drawings [0013]

FIG. 1 is a diagram illustrating an example of a time window configured for acknowledgments / negative acknowledgments for downlink data;

FIG. 2 is a diagram illustrating an example of time windows each configured for a corresponding acknowledgment / negative acknowledgment for a plurality of downlink data;

FIG. 3 is a diagram illustrating an example of managing an acknowledgment / negative acknowledgment response using time windows configured for corresponding acknowledgments / negative acknowledgments;

FIG. 4 is a diagram illustrating another example of managing an acknowledgment / negative acknowledgment response using time windows configured for corresponding acknowledgments / negative acknowledgments;

FIG. 5 is a diagram illustrating another example of managing an acknowledgment / negative acknowledgment response using time windows configured for corresponding acknowledgments / negative acknowledgments;

FIG. 6 is a diagram illustrating an example of the structure of the radio communication system of the present embodiment;

FIG. 7 is a diagram illustrating an example of a general structure of a radio base station according to the present embodiment;

FIG. 8 is a diagram illustrating an example of a functional structure of a radio base station according to the present embodiment;

FIG. 9 is a diagram illustrating an example of the general structure of a user terminal according to the present embodiment;

FIG. 10 is a diagram illustrating an example of a functional structure of a user terminal according to the present embodiment; and

FIG. 11 is a diagram illustrating an example of the hardware structure of the radio base station and user terminal of the present embodiment.

Implementation of the invention

[0014] For a future radio communication system (for example, LTE Version 14 and later, 5G, NR, or the like), the possibility of using a time unit of variable duration (for example, at least one of the following: slot, minislot, or a certain number of symbols) as a scheduling unit for a data channel (including downlink data channel and / or uplink data channel, also referred to simply as “data” or similar).

[0015] Here, a slot is a unit of time based on numerology applied to a user terminal (eg, subcarrier spacing and / or symbol length). The number of symbols per slot can be specified according to the subcarrier spacing. For example, if the subcarrier spacing is 15 kHz or 30 kHz, the number of symbols per slot can be 7 or 14. However, if the subcarrier spacing is at least 60 kHz, the number of symbols per slot can be 14.

[0016] The subcarrier spacing and the symbol length are related. Therefore, for the same number of symbols per slot, the slot length is shorter, the larger (wider) the subcarrier spacing, and the larger, the smaller (narrower) the subcarrier spacing.

[0017] A minislot is a unit of time shorter than a slot. A minislot can include symbols that are less than the number of slots (for example, from one (slot length - 1) to, for example, two or three symbols). Minislots in a slot may have the same numerology applied to the slot (e.g., subcarrier spacing and / or symbol length), or a different numerology than the slot (e.g., subcarrier spacing greater than the slot, and / or the character length is shorter than for the slot).

[0018] A future radio communication system with the possibility of introducing a time unit different from that used for prior art LTE systems would suggest the possibility of using multiple time units for data scheduling and the like. to control the transmission and / or reception (or distribution, etc.) of signals and / or channels. Using different units of time for scheduling data or the like. allows you to create multiple transmission periods / data transmission intervals or the like. For example, a user terminal capable of using multiple time units transmits and / or receives data scheduled in different time units.

[0019] For example, scheduling in a first time unit (eg, slot unit) (scheduling by slot) and scheduling in a second time unit shorter than the first time unit (eg, non-slot unit) (non-slot scheduling) is possible. A non-slot unit can be a minislot unit or a character unit. It should be noted that a slot can include, for example, 7 or 14 symbols, and a minislot can include from one to (slot length -1) symbols.

[0020] In this case, the transmission interval / transmission period for data in the time direction may be different depending on the data scheduling unit. For example, if scheduling is done in units of slots, one data is distributed to one slot. In this case, if the scheduling is carried out not in units of slots (units of minislots or symbols), the data is selectively distributed in areas that are part of one slot. Thus, if the scheduling is not done in units of slots, a lot of data can be distributed to one slot.

[0021] In a future radio communication system, provision is made for a variable transmission interval / transmission period for data or the like. for each scheduling (transmission) event for flexible data scheduling control or the like. For example, in the case of non-slot scheduling, data (eg, physical downlink common channel and / or physical uplink common channel) is mapped to a certain number of symbols for each scheduling event, with the option of starting the allocation position on any symbol.

[0022] As with data (eg, physical downlink common channel and / or physical uplink common channel), the transmission interval / transmission period of which is modifiable, uplink data management information (eg, acknowledgments / negative acknowledgments) is provided for creating variable transmission interval / transmission period for each transmission. For example, the base station applies downlink control information and / or higher layer signals or the like to indicate (message) a transmission interval / transmission period of acknowledgment / negative acknowledgment for a user equipment (UE). In this case, the acknowledgment / negative acknowledgment transmission interval (response interval) corresponding to each data is flexibly configured.

[0023] As indicated above, in a future radio communication system, it is envisaged to change the transmission interval of an acknowledgment / negative acknowledgment or the like. for each downlink transmission (downlink data and / or physical downlink common channel) for each acknowledgment / negative acknowledgment. In such a case, it is difficult to directly implement any control method (e.g. multiplexing, codebook size, etc.) for a known LTE system (e.g. Versions 8 to 13) in which the acknowledgment / negative acknowledgment response is controlled to based on predefined transmission intervals.

[0024] In a future radio communication system, it is possible to flexibly switch the transmission direction (upstream or downstream) in certain time units for control. For example, provide the ability to change the direction of transmission (downstream or upstream) in certain units of time (for example, in slots) for control. In this case, if the allowed acknowledgment / negative acknowledgment transmission for each downstream transmission is limited to a single interval (slot), flexible control of the acknowledgment / negative acknowledgment transmission (or switching the transmission direction) may not be possible.

[0025] In view of the above, the inventors of the present invention have focused on being able to flexibly control the transmission of an acknowledgment / negative acknowledgment or the like. by creating multiple slots where transmission is allowed for one acknowledgment / negative acknowledgment generated for each downstream transmission (downstream data and / or physical downlink common channel) and suggesting to configure a time window for each acknowledgment / negative acknowledgment and control the transmission of acknowledgment / negative acknowledgment (in response) based on the acknowledgment / negative acknowledgment transmission interval and the acknowledgment / negative acknowledgment time window.

[0026] Embodiments of the present invention will be disclosed in the following example drawings. Configurations according to aspects of the invention can be used singly or in combination. It should be noted that hereinafter, the specified acknowledgment / negative acknowledgment response will be disclosed by way of example for downlink data and / or physical downlink common channel, and the present embodiment is applicable to any configuration, provided that such configuration has flexible spacing control capability. transmission (creating a variable transmission interval).

(First aspect)

[0027] In a first aspect, a downlink acknowledgment / negative acknowledgment time window (eg, downlink data and / or physical downlink common channel) is configured to control the acknowledgment / negative acknowledgment (response) transmission. The time window configured for acknowledgments / negative acknowledgments (or downstream data) may be referred to as “acknowledgment / negative acknowledgment transmission window”, “potential acknowledgment / negative acknowledgment transmission period”, “potential acknowledgment / negative acknowledgment interval”, and the like.

[0028] The user terminal (user equipment) performs an acknowledgment / negative acknowledgment response for each downstream transmission. For example, the user equipment implements an acknowledgment / negative acknowledgment response for the downlink data, transmitted in certain units of time. It should be noted that the unit of time can be a period formed by a slot, a minislot, or a certain number of symbols. The unit of time is disclosed below for the example of a slot. However, the present embodiment is not limited to this example.

[0029] The UE may decide the transmission direction for each slot (upstream / downstream direction) based on a message (indication) from the base station. Transmission directions include downstream, upstream, or otherwise (eg unknown). The information related to the direction of transmission can be communicated to the user equipment in the form of information related to the configuration of the slot.

[0030] If the reported direction is different (eg, unknown), the user equipment cannot transmit either upstream or downstream. In other words, if the reported direction is different (for example, unknown), the user terminal does not expect any actions (for example, control and / or operation related to transmission and / or reception) in relation to a specific slot (or a specific time and / or the frequency resource in the slot). For example, the specified time / frequency resource is designed for upward compatibility. The specific time / frequency resource is also referred to as "Unknown resource", "reserved resource", "empty resource", "unused resource", "first time / frequency resource" or similar.

[0031] The unknown resource may be indicated by information (format related information, hereinafter also referred to as “slot format related information”) or the like) related to a time unit format (eg, at least one of the following: one or more slots, one or more minislot, or one or more symbols) in which the data channel is scheduled. As a time unit format, the slot format related information may indicate at least one of the following: a time / frequency resource reserved as an Unknown resource, a number of symbols per time unit, and downstream symbols (downstream symbols) per time unit, and / or upstream symbols (upstream symbols) per unit of time. One or more potential options for the format, indicated by the format-related information for the slot, may be predefined in specifications or configured by routing higher level signals.

[0032] Slot format-related information may be included in downlink control information (also referred to as "group common downlink control information", "first downlink control information" or the like) common to a group including one or more user terminals. Alternatively, the information related to the slot format may be included in other control information communicated by physical layer signals or in control information communicated by higher layer signals.

[0033] For example, the base station semi-statically configures the transmission direction for the user device in each slot using higher level signals (option 1). Alternatively, the base station may dynamically configure the transmission direction in each slot for the user device via physical layer signals (eg, downlink control information) (option 2). The method for reporting (configuring) an uplink / downlink period may include applying option 1 or 2, or alternately applying options 1 and 2. Direction related information may be included in and transmitted as a common information by a plurality of user devices. ...

[0034] The base station informs the user device (configures for the user device) the acknowledgment / negative acknowledgment (response) transmission intervals for the data. For example, the base station semi-statically configures for the user equipment the acknowledgment / negative acknowledgment transmission intervals for downlink data via higher signaling (option 3). Alternatively, the base station may dynamically notify the user equipment the acknowledgment / negative acknowledgment transmission intervals for the downlink data via physical layer signals (eg, downlink control information) (option 4). The method for reporting (configuring) the acknowledgment / negative acknowledgment transmission intervals may include applying option 3 or 4, or alternately applying options 3 and 4.

[0035] In practice, option 1 and / or option 2 can be combined with option 3, or option 1 and / or option 2 can be combined with option 4. The configuration illustrated below is suitable for application to option 4 (or a combination with option 1 and / or option 2). There are no such restrictions.

[0036] FIG. 1 depicts an example in which a time window for acknowledgments / negative acknowledgments for certain units of time (eg, slots) is configured. In this case, a case is illustrated in which the time window for slots # 2-7 is configured for acknowledgment / negative acknowledgment for downlink data transmitted in slot # 0. It should be noted that the time window can be configured for a plurality of contiguous slots or for a plurality of non-contiguous slots. The time window can be configured for one or more slots. The time window can be increased under certain conditions (for example, if there was a failure in the transmission of acknowledgment / negative acknowledgment, etc.)

[0037] The time window can be configured for each acknowledgment / negative acknowledgment corresponding to the downstream data, in time units (eg, slots) with different transmission intervals (see FIG. 2). For example, a time window is configured for each of the different slots. FIG. 2 configure a time window for each of the following acknowledgments: acknowledgment / negative acknowledgment for downstream data # 0 transmitted in slot # 0, acknowledgment / negative acknowledgment for downstream data # 1 transmitted in slot # 1, and acknowledgment / negative acknowledgment for downstream data No. 2 transmitted in slot No. 2.

[0038] Time windows configured for corresponding acknowledgments / negative acknowledgments for downlink data at different transmission intervals may have different configured positions and / or periods, or the same configured position and / or period. FIG. 2 depicts a case in which, for downlink data # # 0-2, the acknowledgment / negative acknowledgment time window has a different position (configured slot indices) but is identical in size (in this case, six slots).

[0039] If the reported acknowledgment / negative acknowledgment transmission interval (or upstream indication) is within the time window, the user equipment multiplexes the acknowledgment / negative acknowledgment bits in the downstream data associated with the time window (corresponding to it) and transmits an acknowledgment / negative acknowledgment. confirmation. In other words, the user equipment multiplexes on an uplink (e.g., physical uplink control channel (PUCCH or physical uplink common channel) an acknowledgment / negative acknowledgment related to a time window including an acknowledgment / negative acknowledgment transmission interval (specific slots), and transmits upstream channel.

[0040] If a time window is configured for each of the acknowledgments / negative acknowledgments for the respective downlink transmissions (downlink data # 0-2 in FIG. 2), the user equipment transmits one or more acknowledgments / negative acknowledgments at specific intervals based on the acknowledgment transmission interval. / negative acknowledgment and time window configured for each acknowledgment / negative acknowledgment.

[0041] For example, in FIG. 2, a case is disclosed in which an acknowledgment / negative acknowledgment transmission interval reported from the base station corresponds to slot # 3 (the message is also referred to as “scheduling” or “starting”). In such a case, the acknowledgment / negative acknowledgment transmission interval falls within the acknowledgment / negative acknowledgment time window for downlink data # 0 and the acknowledgment / negative acknowledgment time window for downlink data # 1. In this case, in slot # 3, the user equipment multiplexes an acknowledgment / negative acknowledgment for downlink data # 0 and an acknowledgment / negative acknowledgment for downlink data # 1, and transmits the multiplexing result.

[0042] FIG. 2, a case is disclosed in which an acknowledgment / negative acknowledgment transmission interval reported from the base station corresponds to slot # 4. In such a case, the acknowledgment / negative acknowledgment interval falls within the acknowledgment / negative acknowledgment window for downlink data # 0, the acknowledgment / negative acknowledgment window for downlink data # 1, and the acknowledgment / negative acknowledgment window for downlink data # 2. ... In this case, in slot # 4, the user equipment multiplexes an acknowledgment / negative acknowledgment for downlink data # 0, an acknowledgment / negative acknowledgment for downlink data # 1, and an acknowledgment / negative acknowledgment for downlink data # 2, and transmits the multiplexing result.

[0043] As mentioned above, if the acknowledgment / negative acknowledgment transmission interval is included in the time window, the acknowledgment / negative acknowledgment included in the time window is multiplexed on the upstream channel, which is then transmitted. It should be noted that, in the case of multiple acknowledgment / negative acknowledgment transmission intervals for one time window (for example, if it is indicated that the acknowledgment / negative acknowledgment transmission should be performed in multiple slots in the time window), the user device may perform multiple acknowledgment / negative acknowledgment transmissions. acknowledgments corresponding to the time window at each transmission interval (in multiple slots).

[0044] A time window is configured for each acknowledgment / negative acknowledgment, and if the acknowledgment / negative acknowledgment transmission interval is included in the time window, an acknowledgment / negative acknowledgment corresponding to the time window is transmitted. It is then possible to transmit acknowledgments / negative acknowledgments for a plurality of downstream data using a common (eg, one) acknowledgment / negative acknowledgment transmission interval. Thus, in contrast to the case in which the interval when an acknowledgment / negative acknowledgment can be transmitted is limited to a single interval, the proposed configuration allows flexible configuration of the transmission interval for each acknowledgment / negative acknowledgment and reduces the number of acknowledgment / negative acknowledgment transmissions relative to the number of downstream transmissions. ... As a result, even if no upstream transmission is configured in any slot, the acknowledgment / negative acknowledgment response can be flexibly controlled by specifying the acknowledgment / negative acknowledgment transmission at certain intervals in the time window.

[0045] For an acknowledgment / negative acknowledgment response for the downlink data transmitted in each slot, at least one acknowledgment / negative acknowledgment transmission interval (or the slot in which the upstream transmission occurs) must be included within the time window configured for each confirmation / negative confirmation. Thus, the base station may indicate an acknowledgment / negative acknowledgment transmission such that at least one acknowledgment / negative acknowledgment transmission interval falls within the time window configured for acknowledgment / negative acknowledgment for the downlink data transmitted in each slot (the indication is also referred to as " planning "or" launch ").

[0046] The UE may control the uplink transmission based on the fact that at least one acknowledgment / negative acknowledgment transmission interval falls within the time window configured for acknowledgment / negative acknowledgment for the downlink data transmitted in each slot. It should be noted that the acknowledgment / negative acknowledgment transmission interval indicated by the base station may be information indicating the slot for which the uplink transmission (or physical uplink control channel) is configured. For example, in the case of receiving information from the base station indicating a slot for which an uplink transmission (or physical uplink control channel) is configured, the user equipment may be configured to perform said acknowledgment / negative acknowledgment transmission in the slot.

[0047] The time window configured for acknowledgment / negative acknowledgment can be communicated from the base station to the user equipment (configured by the base station for the user equipment). For example, information related to the time window configured for acknowledgment / negative acknowledgment may be communicated to the user device via physical layer signals (eg, downlink control information) and / or higher layer signals.

[0048] The base station is configured to notify the user equipment of offset information related to the offset from the reference position to the start interval for the time window and information related to the period (size) of the time window. The reference position may be a slot in which downlink data transmission occurs or a slot in which downlink control information used for scheduling downlink data is transmitted.

[0049] For example, in the case of FIG. 1, the base station reports the offset between the start slot (here # 2) for the time window and the slot (here # 0) for which the downlink data is scheduled and / or the slot in which the downlink control information used for downlink scheduling is transmitted. data. The base station informs the user device of information (in this case, six slots) related to the period (size) of the time window. The time window information for acknowledgments / negative acknowledgments for different downstream data can be reported (configured) individually or collectively.

[0050] The offset can be configured based on the capabilities of the user device in terms of processing time. For example, the offset is configured to be greater than the minimum processing time capability of the user device. Accordingly, the time window can be configured to suit the capabilities of each user device. It should be noted that the offset and / or size of the time window can be fixed.

[0051] Alternatively, the user equipment may apply a predetermined equation to estimate (eg, calculate) an acknowledgment / negative acknowledgment time window for each downlink data. For example, some of the parameter information included in the equation may be communicated to the user device via physical layer signals and / or higher layer signals, and the user device may estimate a time window based on the reported information.

[0052] FIG. 3 and FIG. 4 illustrates a specific example disclosed below in which an acknowledgment / negative acknowledgment response is controlled based on a time window configured for acknowledgment / negative acknowledgment for each downlink data and an acknowledgment / negative acknowledgment transmission interval.

[0053] FIG. 3 shows a case in which the acknowledgment / negative acknowledgment transmission interval is configured at certain times (in this case, in slots # 1, # 6 and # 11). FIG. 4 shows a case in which the acknowledgment / negative acknowledgment transmission interval is configured at certain times (in this case, in slots # 1, # 4, and # 9-11). It should be noted that information related to the acknowledgment / negative acknowledgment transmission interval is reported to the user equipment from the base station.

[0054] FIG. 3 and FIG. 4 discloses cases in which the acknowledgment / negative acknowledgment time window for each downstream data is configured for a specific period (in this case, five slots), starting from the slot following the slot in which the downstream data (or downstream control information, used for planning top-down data). The position and / or size of the time window is of course not limited to this configuration.

[0055] For example, in FIG. 3, the acknowledgment / negative acknowledgment time window for downlink data transmitted in slot # 0 is configured for slots # 1-5. Likewise, the acknowledgment / negative acknowledgment time window for the downlink data transmitted in slot # 1 is configured for slots # 2-6.

[0056] Slot # 1, corresponding to the acknowledgment / negative acknowledgment transmission interval, is included in the acknowledgment / negative acknowledgment time slots for the downlink data transmitted in slots #-4, #-3, #-2, #-1 and # 0, respectively. Thus, when transmitting an acknowledgment / negative acknowledgment in slot # 1, the user device multiplexes acknowledgments / negative acknowledgments for the downlink data transmitted in each of slots #-4, #-3, #-2, #-1 and # 0 and transmits the result multiplexing. Likewise, when transmitting an acknowledgment / negative acknowledgment in slot # 6, the user equipment multiplexes acknowledgments / negative acknowledgments for downstream data in each of slots # 1, # 2, # 3, # 4, and # 5, and transmits the multiplexing result. When transmitting an acknowledgment / negative acknowledgment in slot # 11, the user equipment multiplexes acknowledgments / negative acknowledgments for downstream data in each of slots # 6, # 7, # 8, # 9, and # 10, and transmits the multiplexing result.

[0057] FIG. 3 illustrates a case in which acknowledgment / negative acknowledgment transmission intervals are configured to avoid overlapping acknowledgment / negative acknowledgment transmissions for downlink data in slots. In this case, the number of transmissions of acknowledgments / negative acknowledgments can be reduced to the minimum possible. Of course, in FIG. 4 shows that the acknowledgment / negative acknowledgment transmission intervals can be configured to repeatedly transmit acknowledgment / negative acknowledgment for at least a portion of the downlink data.

[0058] FIG. 4, slot # 4 corresponding to the acknowledgment / negative acknowledgment transmission interval enters the acknowledgment / negative acknowledgment time window for the downlink data transmitted in each of slots # -1, # 0, # 1, # 2 and # 3. Thus, when transmitting an acknowledgment / negative acknowledgment in slot # 4, the user equipment multiplexes acknowledgments / negative acknowledgments for the downlink data transmitted in each of slots # 1, # 0, # 1, # 2, and # 3, and transmits the multiplexing result. Acknowledgment / negative acknowledgment transmission for downlink data transmitted in slots #-1 and # 0 also occurs in slot # 1, that is, the user equipment repeatedly transmits uplink control information including the same acknowledgment / negative acknowledgment content.

[0059] Similarly, when transmitting an acknowledgment / negative acknowledgment in slot # 9, the user equipment multiplexes acknowledgments / negative acknowledgments for the downlink data in each of slots # 4, # 5, # 6, # 7 and # 8 and transmits the multiplexing result. When transmitting an acknowledgment / negative acknowledgment in slot # 10, the user equipment multiplexes acknowledgments / negative acknowledgments for the downstream data in each of slots # 5, # 6, # 7, # 8, and # 9, and transmits the multiplexing result. When transmitting an acknowledgment / negative acknowledgment in slot # 11, the user equipment multiplexes acknowledgments / negative acknowledgments for downstream data in each of slots # 6, # 7, # 8, # 9, and # 10, and transmits the multiplexing result.

[0060] In this case, the user equipment transmits an acknowledgment / negative acknowledgment twice for the downstream data transmitted in slots # 5 and # 9, and transmits an acknowledgment / negative acknowledgment three times for the downstream data transmitted in slots # 6, # 7 and # 8. Thus, multiple acknowledgment / negative acknowledgment responses for the same downlink data can improve the quality of the acknowledgment / negative acknowledgment demodulation.

[0061] As mentioned above, according to the first aspect, a time window for each acknowledgment / negative acknowledgment is configured and the transmission of an acknowledgment / negative acknowledgment is controlled by applying an acknowledgment / negative acknowledgment transmission interval configured within the time window. Therefore, unlike the case in which the transmission period for each acknowledgment / negative acknowledgment is limited to a single transmission period, the first aspect allows flexible control of the acknowledgment / negative acknowledgment response interval.

(Second aspect)

[0062] Disclosed below is an acknowledgment / negative acknowledgment codebook according to the second aspect, by which the acknowledgment / negative acknowledgment time window is configured to control the acknowledgment / negative acknowledgment transmission.

[0063] The user device transmits an acknowledgment / negative acknowledgment using a specific bit size. The bit size used to transmit an acknowledgment / negative acknowledgment is referred to as an acknowledgment / negative acknowledgment codebook, a codebook size, acknowledgment / negative acknowledgment bits, or an acknowledgment / negative acknowledgment bit sequence. In order for the base station to perform a proper receiving process (eg, decoding, etc.) for acknowledgment / negative acknowledgment transmitted from the user equipment, the base station needs to recognize the size of the codebook applied to transmit acknowledgment / negative acknowledgment by the user equipment.

[0064] Thus, according to the second aspect, the following will be disclosed: a case in which a codebook size used for transmitting an acknowledgment / negative acknowledgment is configured with a fixed value (Case 1), and a case in which a codebook size is configured (doing variables) depending on the scheduling of the downstream data (Case 2).

<Case 1>

[0065] At a certain unit of time (eg, certain slots), the user equipment generates acknowledgment / negative acknowledgment bits for a given slot regardless of whether the downlink data is scheduled for that slot. For example, in each slot in FIG. 3 acknowledgment / negative acknowledgment bits for a given slot are generated regardless of whether the downstream data is scheduled for each slot. In other words, the user equipment generates acknowledgment / negative acknowledgment bits in each slot regardless of whether the downlink data has been received. It should be noted that the object (slots) for which the acknowledgment / negative acknowledgment bits are generated can be all slots, or only those slots for which the downstream transmission is configured / reported.

[0066] If the object (s) for which the acknowledgment / negative acknowledgment bits are generated are all slots, the acknowledgment / negative acknowledgment codebook continuously transmitted by the user device is of the same size. If the object (s) for which the acknowledgment / negative acknowledgment bits are generated are only those slots for which the downstream transmission is configured / reported, the acknowledgment / negative acknowledgment codebook transmitted by the user device may be different depending on the configured / reported slot configuration. downlink transmission, while allowing the base station and the terminal to generally recognize the codebook even in the event of an error in detecting the downlink control information used for scheduling the downlink data.

[0067] The acknowledgment / negative acknowledgment transmission interval in FIG. 3 (for example, slot # 6) refers to the acknowledgment / negative acknowledgment time window for downstream data in slots # 1 through 5. In this case, acknowledgment / negative acknowledgment bits are generated for slots # 1 through 5 regardless of whether downstream data for slots # 1 - 5 (or whether they are received in these slots). In other words, the sizes of the acknowledgment / negative acknowledgment bits generated in any acknowledgment / negative acknowledgment transmission interval (eg, slot # 6) are determined by the number of acknowledgments / negative acknowledgments constituting a time window including the transmission interval.

[0068] As indicated above, in Case 1, the acknowledgment / negative acknowledgment is transmitted with a fixed codebook size applied in the acknowledgment / negative acknowledgment transmission intervals (for example, slots # 1, # 6, and # 11 in FIG. 3), regardless of whether downstream data has been received in each slot. This enables transmission by applying a fixed codebook size even if the user equipment falsely detects a downlink signal (downlink data and / or downlink control information used for scheduling downlink data) in a slot. The result is that the user equipment and the base station can equally recognize the size of the codebook and, in turn, the base station can properly perform the reception process.

[0069] If the detection of downlink control information (eg, downlink assignment) used to schedule downlink data in a specific slot fails, the UE generates a negative acknowledgment for that slot. In case of failure to detect the downlink control information used for scheduling downlink data in slot # 0 (for example, downlink control information found in the same slot # 0), the user equipment decides that the acknowledgment / negative acknowledgment for the downlink data in slot # 0 is negative acknowledgment and generates acknowledgment / negative acknowledgment bits.

[0070] If downlink control information (eg, downlink assignment) used for downlink scheduling fails to detect in a specific slot, the UE generates a negative acknowledgment for that slot for which downlink data is scheduled. In case of failure to detect in slot # 0 downlink control information used to schedule downlink data in a specific slot (slot after # 0), the user equipment decides that the acknowledgment / negative acknowledgment for such specific slots is negative acknowledgment and generates acknowledgment / negative acknowledgment bits. ... If cross-slot scheduling is applied, the downlink data and the downlink control information used for downlink data scheduling are allocated to different slots, whereby a negative acknowledgment decision can be made based on the downlink data slot as disclosed above.

<Case 2>

[0071] At a certain unit of time (eg, a certain slot), the user equipment generates acknowledgment / negative acknowledgment bits for a given slot depending on whether downlink data is scheduled for that slot. For example, in the case of FIG. 3, in which the downlink data is scheduled for a specific slot (eg, slot # 0), acknowledge / negative acknowledgment bits are generated for slot # 0. In this case, if no downstream data is scheduled for slot # 0, do not generate any acknowledgment / negative acknowledgment bits for slot # 0.

[0072] In this case, the user equipment determines the size of the codebook to be used for the acknowledgment / negative acknowledgment transmission in the acknowledgment / negative acknowledgment transmission interval (in the acknowledgment / negative acknowledgment transmission slot) in consideration of the slot for which the downlink data is actually scheduled.

[0073] The acknowledgment / negative acknowledgment transmission interval in FIG. 3 (for example, slot # 6) refers to the time window for an ACK / NAC for downstream data in slots # 1 through 5. In this case, the user device controls the generation of ACK / NACK bits for downstream data in slots # 1 through 5. and the size of the codebook considering whether the downstream data is scheduled for each of the slots # 1 to # 5.

[0074] For example, if the downstream data is scheduled for slots # 2, # 4 and # 5, an acknowledgment / negative acknowledgment is generated in slots # 1-5 for each of the downstream data in slots # 2, # 4, and # 5, and the size is determined code book. In other words, the size of the acknowledgment / negative acknowledgment bits generated in the acknowledgment / negative acknowledgment transmission interval is determined based on the number of acknowledgments / negative acknowledgments for each of the corresponding downstream data that is actually scheduled, while acknowledgments / negative acknowledgments are included in the acknowledgments / negative acknowledgments corresponding to a time window including the transmission interval.

[0075] It should be noted that, for example, the Downlink Assignment Index (DL DAI) included in the downlink control information used for scheduling can be used to decide whether the downlink data is scheduled for each slot. downstream data. In other words, the user equipment may decide to fail to recognize the physical downlink control channel (or downlink control information) in each slot based on the downlink assignment index. The downlink assignment index may be composed of a general downlink assignment index indicating the total amount of downlink data scheduled for a specific period and an inverse downlink assignment index indicating the total value for the scheduled downlink data, or only a reverse downlink assignment index.

<Acknowledgment / Negative Acknowledgment Bit Positions>

[0076] As stated above, in the case of multiple acknowledgment / negative acknowledgment transmissions within the time window configured for each acknowledgment / negative acknowledgment, the problem is how to control the acknowledgment / negative acknowledgment bit positions (multiplex positions). Therefore, a case will now be disclosed in which the acknowledgment / negative acknowledgment bit positions (the hybrid automatic retransmission request acknowledgment bit positions) are controlled in a codebook size configuration method (Case 1 or Case 2).

[0077] If the codebook size is configured with a fixed value (Case 1), the order of the acknowledgment / negative acknowledgment bits (multiplex order) is controlled based on the slot number (slot index) of the downstream data corresponding to each acknowledgment / negative acknowledgment. In other words, the acknowledgment / negative acknowledgment bits are distributed in ascending order of the slot numbers in which the downlink data is transmitted from which acknowledgment / negative acknowledgment is generated.

[0078] For example, it is assumed that for the acknowledgment / negative acknowledgment transmission interval in FIG. 3 (for example, slot # 6), the transmission of acknowledgments / negative acknowledgments for downstream data occurs in slots # 1-5. In such a case, the acknowledgment / negative acknowledgment for the downstream data for slot # 1 is set as the head acknowledgment / negative acknowledgment, and then the acknowledgments / negative acknowledgments for the downstream data in slots # 2 through 5 are multiplexed in order. Acknowledgments / Negative Acknowledgments based on Downstream Data Slot Numbers allows you to distribute acknowledgments / negative acknowledgments in order of generation, starting with the earliest generated acknowledgment / negative acknowledgment. This prevents a possible delay in the generation of acknowledgment / negative acknowledgment bits.

[0079] If the size of the codebook is configured (made variable) depending on the scheduling of the downlink data (Case 2), the order of the acknowledgment / negative acknowledgment bits can be controlled depending on the transmission order of the downlink scheduling data (or the order of their reception). The transmission order of the downlink scheduling data can be understood as the order of the downlink assignment index (eg, the reverse downlink assignment index). In other words, the UE determines the distribution order of acknowledgments / negative acknowledgments by the downlink assignment index. This allows ACK / NACs for the downstream data to be distributed in order, starting with the ACK / NAC for the downstream data with the earliest date, thereby preventing a possible delay in the generation of ACK / NAC bits.

[0080] It should be noted that in the case of an acknowledgment / negative acknowledgment response for semi-persistent scheduling (DL SPS, Downlink Semi-Persistent Scheduling), the acknowledgment / negative acknowledgment bits for the downlink data to be semi-persistent downlink scheduling, can be distributed to the head-end or tail-area of the bits.

[0081] In the case of applying semi-persistent downlink scheduling, the downlink data transmitted in each slot is not scheduled using the downlink control information. Therefore, the user equipment fails to determine, using the downlink assignment index included in the downlink control information, the transmission order of the downlink data to which downlink semi-persistent scheduling is applied. In this regard, the acknowledgment / negative acknowledgment bits in the downlink data to which downlink semi-persistent scheduling is applied are allocated to the head or tail area of the bits of the bit sequence to be transmitted. This allows the acknowledgment / negative acknowledgment for the downlink data to be properly multiplexed to which downlink semi-persistent scheduling is applied using the acknowledgment / negative acknowledgment for the downlink scheduling data, and transmit the multiplexing result.

(Third aspect)

[0082] The following discloses an acknowledgment / negative acknowledgment transmission control according to a third aspect, applied in the event of an acknowledgment / negative acknowledgment transmission failure by applying a time window configured for an acknowledgment / negative acknowledgment.

[0083] Depending on the communication medium, it is possible for the user device to fail to transmit an acknowledgment / negative acknowledgment within the time window configured for an acknowledgment / negative acknowledgment. For example, in the unlicensed frequency band, listen-before-talk (LBT) is carried out before the upstream transmission is made. When no listening is in progress, upstream transmission is allowed, and when listening is in progress, upstream transmission is restricted. Therefore, in the acknowledgment / negative acknowledgment transmission interval (for example, a specific slot) reported from the base station while listening before the upstream transmission (acknowledgment / negative acknowledgment transmission), the acknowledgment / negative acknowledgment transmission may fail in the specified specific slot. and, as a consequence, transmission failure within the time window.

[0084] Alternatively, in some cases, the base station may not indicate (or schedule, or start) an acknowledgment / negative acknowledgment transmission interval for downlink data to be configured within the time window. For example, if the time period of the downlink resource is extended to provide it to another user transmitting data on the same carrier or some running service, and the time period for configuring the uplink resource is increased, the acknowledgment / negative acknowledgment interval may be excluded from the limits. time window.

[0085] Therefore, according to the present aspect, in the case of failure to transmit an acknowledgment / negative acknowledgment within a configured time window, control is performed to enable an acknowledgment / negative acknowledgment to be transmitted in the interval in which the user equipment can transmit an acknowledgment / negative acknowledgment first. after the end of the time window.

[0086] FIG. 5 shows a case where upstream transmission is restricted for a specific reason in slots # 8-10 (eg, listening before upstream transmission). FIG. 5, there is no acknowledgment / negative acknowledgment transmission interval within the time window configured for acknowledgments / negative acknowledgments for the downlink data transmitted in slots # 4 and # 5. This prevents the user device from transmitting acknowledgments / negative acknowledgments for the downlink data transmitted in slots # 4 and # 5 within the time window.

[0087] In such a case, control is performed so that the transmission of acknowledgments / negative acknowledgments for the downlink data transmitted in slots # 4 and # 5 occurs in an acknowledgment / negative acknowledgment interval configured to be the earliest interval (in this case - slot # 11) after the end of the time window. In this case, slot # 11 is included in the time window for acknowledgments / negative acknowledgments for downstream data in slots # 6 - 10, and therefore the transmission of acknowledgments / negative acknowledgments for downstream data in slots # 4 and # 5 occurs in addition to acknowledgments / negative acknowledgments for downlink data in slots # 6 - 10. In this case, it may mean that the time windows for confirmations / negative acknowledgments for downlink data in slots # 4 and # 5 are increased.

[0088] Thus, in the case of failure to transmit an acknowledgment / negative acknowledgment in the configured time window, the acknowledgment / negative acknowledgment is transmitted in the acknowledgment / negative acknowledgment transmission interval after the end of the time window. This enables an acknowledgment / negative acknowledgment to be transmitted properly and prevents degradation of the communication quality.

(Radio communication system)

[0089] Next, the structure of the radio communication system of the present embodiment will be disclosed. The present radio communication system employs a radio communication method according to any of the above aspects. It should be noted that the radio communication techniques in accordance with the aspects disclosed above may be applied singly or in combination.

[0090] FIG. 6 is a diagram illustrating an example of the structure of the radio communication system of the present embodiment. The radio communication system 1 is made with the possibility of carrier aggregation and / or dual connectivity (DC) for grouping a plurality of elementary frequency blocks (elementary carriers) into one, and the frequency band in the LTE system (for example , 20 MHz) forms one element. It should be noted that the radio communication system 1 may also be referred to as "SUPER 3G", "advanced LTE scheme" (eng. LTE-A (LTE-Advanced), “advanced scheme IMT” (eng. IMT-Advanced), 4G, 5G, “ future radio access system ”(FRA, Future Radio Access),“ new radio access technology ”(NR, New RAT), etc.

[0091] The radio communication system 1 in FIG. 6 contains a radio base station 11 forming a macro cell C1, and base stations 12a-12c forming a small cell C2, which are located within the macrocell C1 and narrower than the macrocell C1. In addition, user terminals 20 are located within the macro cell C1 and the small cell C2. Different numerologies can be applied to the respective cells. It should be noted that "numerology" means a set of communication parameters characterizing the synthesis of signals in a particular radio access technology and / or the structure of the radio access technology.

[0092] The user terminals 20 are configured to connect to both the radio base station 11 and the radio base stations 12. The user terminals 20 are configured to simultaneously use the macro cell C1 and small cells C2 through carrier aggregation or dual connection, with the macro cell C1 and small cells C2 use different frequencies. The user terminals 20 are configured for carrier aggregation or dual connection by employing multiple component carriers (eg, two or more component carriers). The user terminal is configured to use a licensed band elementary carrier and an unlicensed band elementary carrier as a plurality of cells.

[0093] User terminals 20 may communicate in time division duplex or frequency division duplex in each cell. A cell that communicates in time division duplex and a cell that communicates in frequency division duplex may be referred to as a time division carrier (type 2 frame structure), a frequency division carrier (type 1 frame structure), etc. .P. respectively.

[0094] Each cell (carrier) is configured to operate on a subframe of relative duration (eg, 1 millisecond) (also referred to as "transmission time slot", "normal transmission time slot", "long transmission time slot", "normal subframe", long subframe, "slot", etc.) or a subframe of relatively short duration (also referred to as "short transmission time slot", "short subframe", "slot", etc.), or with a long subframe, and with short subframe. Each cell is configured to operate with subframes of two or more durations.

[0095] Communication between user terminals 20 and radio base station 11 may be carried out using a carrier from a relatively low frequency band (e.g., 2 GHz) or from a narrow band (referred to, for example, "existing carrier", "old type carrier", etc.) .P.). In this case, communication between user terminals 20 and base radio stations 12 can be carried out using a carrier from a band of relatively high frequencies (for example, 3.5 GHz, 5 GHz, 30-70 GHz, etc.) and from a wide frequency band, or the same carrier as between the user terminals 20 and the radio base station 11. It should be noted that the structure of the frequency band for use in each radio base station is in no way limited to the above.

[0096] Communication between the radio base station 11 and the radio base stations 12 (or between two radio base stations 12) can be carried out via a wired connection (for example, optical fiber, according to the standard CPRI interface (English Common Public Radio Interface), X2 interface etc.), or a wireless connection can be established between them.

[0097] The radio base station 11 and each of the radio base stations 12 are connected to the higher-level station apparatus 30 and to the core network 40 through the higher-level station apparatus 30. It should be noted that the higher-level station apparatus 30 may include, for example, an access gateway device, a radio network controller (RNC), a mobility management entity (MME), and the like. , but in no way limited by them. Each radio base station 12 can also be connected to a higher-level station apparatus 30 via a radio base station 11.

[0098] It should be noted that the radio base station 11 is a radio base station with a relatively wide coverage and may be referred to as "macro base station", "central site", "eNB type base station (eNodeB)", "transceiver station", etc. ... Radio base stations 12 are local base stations and may be referred to as “small base stations”, “micro base stations”, “pico base stations”, “femto base stations”, “HeNBs (Home eNodeBs)”, “remote radio units” (eng. RRH, Remote Radio Heads), "transceiver points", etc. Hereinafter, unless specifically indicated otherwise, the radio base stations 11 and 12 will be collectively referred to as "radio base stations 10".

[0099] Each of the user terminals 20 is a terminal capable of implementing a variety of communication schemes, such as LTE and LTE-A, which may include not only mobile communication terminals but also fixed communication terminals. The user terminal 20 is configured to communicate directly in the D2D (device-to-device) mode with another user terminal 20.

[0100] The radio communication system 1 is configured to use, as radio access schemes, orthogonal frequency division multiple access (OFDMA) in the downlink and frequency division multiple access single carrier schemes (eng. SC-FDMA, single carrier frequency division multiple access) in the uplink. An orthogonal frequency division multiple access scheme is a multi-carrier communication scheme in which communication is performed by dividing a frequency band into multiple narrower frequency bands (subcarriers) and mapping data to each subcarrier. A single carrier frequency division multiple access scheme is a single carrier communication scheme in which interference between terminals is eliminated by dividing, by a terminal, the frequency bands of a system into frequency bands formed by one or more contiguous resource blocks and allowing multiple terminals to use of different frequency bands. It should be noted that the uplink and downlink radio access schemes are not limited to a combination of these schemes, and that an orthogonal frequency division multiple access scheme can be used in the uplink. Single carrier frequency division multiple access can be used in a sidelink (SL) connection between devices.

[0101] In the radio communication system 1, a downlink data channel (also called a physical downlink common channel, a downlink common channel, etc.) shared by all user terminals 20 is used as the downlink channels. (Physical Broadcast Channel)), L1 / L2 control channels, etc. At least one of the following: user data, higher-level control information, system information blocks (SIBs), etc. transmitted over a physical downlink common channel. Master information blocks (MIBs) are transmitted over a physical broadcast channel.

[0102] The L1 / L2 control channels include a downlink control channel (for example, a physical downlink control channel and / or an enhanced physical downlink control channel (EPDCCH), a physical control format indication channel (PCFICH) Physical Control Format Indicator Channel), Physical Hybrid-ARQ Indicator Channel (PHICH), etc. Downlink control information including scheduling information of a physical downlink common channel and / or physical of the uplink common channel, etc., are transmitted on the physical downlink control channel and / or the enhanced physical downlink control channel The number of orthogonal frequency division multiplexing (OFDM) symbols to be applied for the physical downlink control channel is reported on the physical control format indication channel I. The advanced physical downlink control channel is frequency division multiplexed with the physical downlink common channel and serves to transmit downlink control information and the like like the physical downlink control channel. At least one of the following channels: the Hybrid Automatic Retransmission Request Physical Indicator Channel, the Physical Downlink Control Channel, and the Enhanced Physical Downlink Control Channel, may be used to transmit transmission acknowledgment information over the physical uplink common channel (Hybrid Automatic Retransmission Request Confirmation / Negative and Acknowledgment transmission).

[0103] As the uplink channels in the radio communication system 1, an uplink data channel (physical uplink common channel, uplink common channel, or the like) shared by all user terminals 20, an uplink control channel (physical uplink control channel), random access (PRACH, Physical Random Access Channel)), etc. User data, higher level control information, and the like. transmitted over a physical uplink shared channel. Uplink control information including at least one of the following: transmission acknowledgment information (acknowledgment / negative acknowledgment, hybrid automatic retransmission request acknowledgment) and channel state information (CSI) of the physical downlink common channel are transmitted over a physical uplink shared channel or a physical uplink control channel. The physical random access channel can transmit random access preambles to establish a connection with cells.

<Radio base station>

[0104] FIG. 7 is a diagram illustrating an example of a general structure of a radio base station according to the present embodiment. The radio base station 10 includes a plurality of transmit / receive antennas 101, amplification sections 102, transmission / reception sections 103, a baseband signal processing section 104, a call processing section 105, and a transmission line interface 106. It should be noted that the radio base station 10 may be configured with one or more transmit / receive antennas 101, one or more amplification sections 102, and one or more transmit / receive sections 103.

[0105] User data for transmission from the radio base station 10 to the user terminal 20 on the downlink is supplied from the higher-level station apparatus 30 to the baseband signal processing section 104 via the transmission line interface 106.

[0106] In baseband signal processing section 104, user data is subjected to transmission processes, for example, at least one of the following: Packet Data Convergence Protocol (PDCP) layer process, user data splitting and combining, such processes transmission of the radio link control layer (RLC, Radio Link Control), as control of retransmission at the RLC level, control of the retransmission of the MAC layer (Medium Access Control, medium access control) (for example, the HARQ process, scheduling, selection of transport format, channel coding, rate matching, scrambling, inverse fast Fourier transform (IFFT) and precoding, and the result is sent to each transmit / receive section 103. The downstream control signals are also subjected to transmission processes such as channel coding and / or reverse fast conversion Fourier, and the result is sent to each transmission / reception section 103.

[0107] In the transmission / reception sections 103, the baseband signals that have been precoded and output from the baseband signal processing section 104 are converted individually for each antenna into radio frequency bands and the result is transmitted. The RF signals that have passed the frequency conversion in the transmit / receive sections 103 are amplified in the amplifying sections 102 and transmitted through the transmit / receive antennas 101.

[0108] The transmit / receive sections 103 may be configured with transceivers, transmit / receive circuits, or transmit / receive devices, which may be described based on common knowledge in the art to which the present invention pertains. It should be noted that any transmission / reception section 103 may be constructed as a single transmission / reception section, or may be constituted by a transmission section and a reception section.

[0109] Here, as for the uplink signals, the radio frequency signals received in the transmit / receive antennas 101 are amplified in the amplification sections 102. Sections 103 transmit / receive receive uplink signals amplified in sections 102 amplification. The transmission / reception sections 103 convert the received signals into a baseband signal by frequency conversion and output to the baseband signal processing section 104.

[0110] In baseband signal processing section 104, the uplink data contained in the uplink input signals is subjected to FFT, inverse discrete Fourier transform (IDFT), error correction decoding, reception process in replay control. transmission of the medium access control layer, as well as the reception processes of the radio link control layer and the packet data downlink protocol layer, and forwarded to the higher layer station apparatus 30 via the transmission line interface 106. The call processing section 105 performs at least one of the following: call processing such as tuning and releasing for communication channels, managing the states of the radio base station 10, and managing radio resources.

[0111] The transmission line interface 106 transmits signals to and / or receives signals from the higher-level station apparatus 30 via a specific interface. The transmission line interface 106 is configured to communicate for transmitting and / or receiving signals (backhaul signals) with neighboring radio base stations 10 via an inter-office interface (eg, CPRI optical fiber and X2 interface).

[0112] The transmission / reception sections 103 receive retransmission control information for downlink transmission. The transmission / reception sections 103 transmit to the user terminal at least one of the following: information related to the transmission interval for the retransmission control information, information related to the time window (e.g., offset, size, etc.) configured for the control information retransmission, and information related to the structure of the slots (eg, the transmission direction of the slots, etc.).

[0113] The transmission / reception sections 103 receive one or more pieces of retransmission control information in accordance with transmission intervals for the retransmission control information and a time window configured for each piece of retransmission control information. The transmission / reception sections 103 may report the transmission interval such that at least one transmission interval for the retransmission control information falls within each time window.

[0114] FIG. 8 is a diagram illustrating an example of a functional structure of a radio base station of the present embodiment. It should be noted that in FIG. 8 depicts the main functional blocks included in the characteristic parts of the present embodiment, it being understood that the radio base station 10 may include other functional blocks also required for radio communication. Baseband signal processing section 104 in FIG. 8 includes at least a control section 301, a transmission signal generating section 302, a display section 303, a received signal processing section 304, and a measurement section 305.

[0115] The control section 301 controls the radio base station 10 as a whole. For example, the control section 301 controls at least one of the following: generating downlink signals by the transmit signal generating section 302, displaying the downlink signals by the display section 303, receiving (e.g., demodulating, etc.) upstream signals by the received signal processing and measurement section 304 measuring section 305.

[0116] Specifically, the control section 301 schedules the user terminal 20. For example, the control section 301 controls the transmission interval and / or transmission period for the uplink common channel and the transmission interval / transmission period for the uplink control information. The control section 301 controls the configuration (downlink transmission, upstream transmission, etc.) of each slot.

[0117] If the time windows are configured for the retransmission control information, the control section 301 controls the reception of the retransmission control information based on the determined intervals and time windows configured for the retransmission control information. The control section 301 can control the reporting of the specified specific intervals so that at least one specific interval falls within each time window.

[0118] The control section 301 may be configured with a controller, a control circuit, or a control apparatus, which may be described based on knowledge generally known in the art to which the present invention pertains.

[0119] The transmission signal generating section 302 generates downstream signals (downstream control signals, downstream data signals, downstream reference signals, etc.) depending on commands from the control section 301 and outputs downstream signals to the display section 303.

[0120] The transmission signal generating section 302 may be a signal generator, a signal generating circuit, or a signal generating device, which may be described based on knowledge generally known in the art to which the present invention pertains.

[0121] The mapping section 303 maps the downlink signals generated in the transmission signal generation section 302 to certain radio resources depending on the commands from the control section 301 and outputs them to the transmission / reception section 103. The display section 303 may be a display, a display of a circuit, or a display device, which may be described based on knowledge generally known in the art to which the present invention pertains.

[0122] The received signal processing section 304 performs a receiving process (eg, demapping, demodulation, decoding, and the like) on uplink signals (including, for example, uplink data signals, uplink control signals, uplink reference signals), transmitted from the user terminal 20. Specifically, the received signal processing section 304 may output the received signals and / or signals that have passed the reception processes to the measuring section 305. The received signal processing section 304 carries out a process for receiving uplink control information depending on the uplink control channel configuration specified by control section 301.

[0123] The measurement section 305 performs measurements with respect to the received signals. Meter section 305 may be configured with a meter, metering circuit, or metering device, which may be described based on knowledge generally known in the art to which the present invention pertains.

[0124] For example, the measurement section 305 can measure the quality of the upstream channel in terms of power (for example, the power of the received reference signals (RSRP, (Reference Signal Received Power)) and / or quality (for example, the quality of the received reference signals (RSRQ, Reference Signal Received Quality)) of the received uplink reference signals The measurement results can be output to the control section 301.

<User terminal>

[0125] FIG. 9 is a diagram illustrating an example of the general structure of a user terminal according to the present embodiment. The user terminal 20 contains a plurality of transmit-receive antennas 201 for transmission using MIMO technology (Multiple Input Multiple Output), amplification sections 202, transmission / reception sections 203, baseband signal processing section 204 and an application section 205 ...

[0126] RF signals received by the plurality of transceiver antennas 201 are amplified in respective amplification sections 202. Sections 203 transmit / receive receive downlink signals amplified in sections 202 amplification. The transmit / receive sections 203 convert the received signals into baseband signals by frequency conversion, and outputs the baseband signals to the baseband signal processing section 204.

[0127] The baseband signal processing section 204 performs, with respect to the received baseband signals, at least one of the following processes: fast Fourier transform, error correction decoding, reception process in retransmission control, and the like. The downstream data is directed to the application section 205. The application section 205 implements processes related to layers higher than the physical and media access control layers, and the like.

[0128] From the application section 205, upstream data is input to the baseband signal processing section 204. The baseband signal processing section 204 performs at least one of the following processes: a retransmission control process (e.g., a hybrid automatic retransmission request process), channel coding, rate matching, puncturing, a discrete Fourier transform process, an inverse fast Fourier transform process, and the like, and sends the result to the transmit / receive section 203. At least one of the following processes: channel coding, rate matching, puncturing, discrete Fourier transform process, inverse fast Fourier transform process, and the like. are also applied to uplink control information (e.g., at least one of the following: downlink acknowledgment / negative acknowledgment, CSI information, and SR scheduling request, etc.), and the result is sent to the transmit / receive section 203.

[0129] In the transmission / reception sections 203, baseband signals output from the baseband signal processing section 204 are converted into radio frequency bands and the result is transmitted. The RF signals that have undergone frequency conversion in the transmit / receive sections 203 are amplified in the amplifying sections 202 and transmitted via the transmit / receive antennas 201.

[0130] Sections 203 transmit / receive transmit retransmission control information for downlink transmission (eg, downlink data and physical downlink common channel). The transmit / receive sections 203 receive at least one of the following: information related to the transmission interval for the retransmission control information, information related to the time window (e.g., offset, size, etc.) configured for the retransmission control information , and information related to the structure of the slots (eg, the transmission direction of the slots, etc.).

[0131] Sections 203 transmitting / receiving transmit one or more pieces of retransmission control information in accordance with transmission intervals for the retransmission control information and a time window configured for each piece of retransmission control information. Sections 203 transmit / receive may control uplink transmission (eg, transmission of acknowledgment / negative acknowledgment) based on the fact that at least one transmission interval for retransmission control information falls within each time window.

[0132] The transmit / receive sections 203 may be transceivers, transmitting / receiving circuits, or transceiver devices, which may be described based on knowledge generally known in the art to which the present invention pertains. Each transmission / reception section 203 may be constructed as a single transmission / reception section, or may be constituted by a transmission section and a reception section.

[0133] FIG. 10 is a diagram illustrating an example of a functional structure of a user terminal according to the present embodiment. It should be noted that in FIG. 10 depicts the main functional blocks that are part of the characteristic parts of the present embodiment, it is understood that the user terminal 20 may include other functional blocks also required for radio communication. FIG. 10 shows that the baseband signal processing section 204 contained in the user terminal 20 comprises at least a control section 401, a transmission signal generating section 402, a display section 403, a received signal processing section 404, and a measurement section 405.

[0134] The control section 401 controls the user terminal 20 as a whole. For example, the control section 401 controls at least one of the generation of upward signals by the transmission signal generation section 402, the display of upstream signals by the display section 403, the process of receiving downstream signals by the received signal processing section 404, and measurements performed by the measurement section 405.

[0135] The control section 401 controls the transmission of retransmission control information at specific intervals reported from the base station (or pre-configured). For example, if time windows are configured for retransmission control information for downlink transmission, control section 401 controls transmission of one or more pieces of retransmission control information based on the specified determined intervals and time windows configured for retransmission control information (see FIG. 1- 3). The control section 401 can control the uplink transmission based on the fact that at least one determined interval falls within the time window.

[0136] If a plurality of defined slots enter the time window, the control section 401 may control for transmitting, in steps corresponding to the plurality of specified slots, retransmission control information included in the time window (see FIG. 4).

[0137] The control section 401 controls the size of the codebook of the retransmission control information transmitted at certain intervals, regardless of whether the downlink transmission is scheduled. Alternatively, the control section 401 may control the size of the codebook of the retransmission control information transmitted at specific intervals depending on whether the downlink transmission is scheduled.

[0138] If transmission of retransmission control information for a plurality of downlink transmissions occurs at certain intervals, control section 401 controls the multiplexing position of the pieces of retransmission control information in accordance with the number of the time unit in which the downstream transmission is performed or the transmission order of the downstream transmissions.

[0139] In the event that transmission of the retransmission control information within the time window fails, the control section 401 may provide control to transmit to the earliest slot in which the transmission of the retransmission control information occurs after the end of the time window (see FIG. 5).

[0140] The control section 401 may be configured with a controller, a driving circuit, or a control device, which may be described based on knowledge generally known in the art to which the present invention pertains.

[0141] Transmission signal generating section 402 generates (e.g., coding, rate matching, puncturing, modulation, etc.) uplink signals (uplink data signals, uplink control signals, uplink reference signals, uplink control information, etc.) depending on the commands from the control section 401 and outputs upstream signals to the display section 403. The transmission signal generating section 402 may be a signal generator, a signal generating circuit, or a signal generating device, which may be described based on knowledge generally known in the art to which the present invention pertains.

[0142] The mapping section 403 maps the uplink signals generated in the transmission signal generating section 402 to radio resources depending on the commands from the control section 401 and outputs the result to the transmission / reception section 203. The display section 403 may be a display, a display of a circuit, or a display device, which may be described based on knowledge generally known in the art to which the present invention pertains.

[0143] The received signal processing section 404 performs receiving processes (eg, demapping, demodulation, decoding, and the like) on the downlink signals (downlink data signals, scheduling information, downlink control signals, and downlink reference signals). The received signal processing section 404 outputs to the control section 401 information received from the radio base station 10. For example, the received signal processing section 404 outputs to the control section 401 broadcast information, system information, higher layer control information obtained by higher level signals, for example, radio resource control signals (RRC), physical layer control information (L1 / L2 control information) and the like.

[0144] The received signal processing section 404 may be configured with a signal processor, signal processing circuitry, or signal processing apparatus, which may be described based on knowledge generally known in the art to which the present invention pertains. The received signal processing section 404 may form a receiving section of the present invention.

[0145] The measurement section 405 measures the channel state from reference signals (eg, channel status information (CSI-RS) reference signals) from the radio base station 10 and outputs the measurement result to the control section 401. It should be noted that channel state measurements can be performed on each elementary carrier.

[0146] Measuring section 405 may be provided with a signal processor, signal processing circuitry, or signal processing device, as well as a meter, measurement circuit, or measuring device, which may be described based on knowledge generally known in the art to which the present invention pertains. ...

<Hardware structure>

[0147] It should be noted that the block diagrams exemplifying the above embodiments depict blocks as functional units. These functional blocks (components) can be implemented as arbitrary combinations of hardware and / or software. In addition, the method for implementing any functional block is not limited to any particular embodiment. That is, any functional block can be implemented as one physically and / or logically integrated unit of the device, or implemented by direct and / or indirect connection (for example, wired and / or wireless) two or more physically and / or logically separate units of devices and applications of a given set of units of devices.

[0148] For example, a radio base station, a user terminal, and the like. the present embodiment can function as a computer executing processes of the proposed radio communication method. FIG. 11 is a diagram illustrating an example of a hardware structure of a radio base station and a user terminal of the present embodiment. Physically, both the radio base station 10 and the user terminals 20 disclosed above may be formed as a computing device including a processor 1001, a memory 1002, a memory 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc. .P.

[0149] It should be noted that in the following description, the word “apparatus” may mean “circuit,” “device,” “block,” and the like. The hardware structure of the radio base station 10 and user terminal 20 can be designed to include one or a plurality of device units shown in the drawings, or with the possibility of missing a part of the device units.

[0150] For example, although only one processor 1001 is shown, multiple processors may be formed. Processes can also be implemented by one processor or simultaneously, sequentially or in different ways by one or more processors. It should be noted that the processor 1001 may be configured with one or more chips.

[0151] For example, the implementation of each of the functions of the radio base station 10 and user terminals 20 occurs by allowing certain software (programs) to be read in hardware, for example, the processor 1001 and memory 1002, and by allowing the processor 1001 to perform computations for communication control via communication device 1004 and control reading and / or writing data in memory 1002 and memory 1003.

[0152] The processor 1001 controls the computer as a whole, for example, by operating an operating system. The processor 1001 can be configured with a central processing unit (CPU) containing interfaces to a peripheral device, a control device, a computing device, a register, and the like. For example, the above disclosed baseband signal processing section 104 (204), call processing section 105, and the like. can be implemented by the processor 1001.

[0153] In addition, the processor 1001 reads programs (program codes), software modules, data, and the like. from the memory 1003 and / or the communication device 1004 in the memory 1002 and in accordance therewith executes various processes. With regard to programs, those are used that enable computers to execute at least a portion of the operations of the above-disclosed embodiments. For example, the control section 401 of each user terminal 20 can be implemented by control programs stored in the memory 1002 and running in the processor 1001, while other functional blocks can be implemented in a similar manner.

[0154] The memory 1002 is a machine-readable recording medium and can be formed, for example, by at least one of the following: read-only memory (Read Only Memory), EPROM, Erasable Programmable ROM), electrically erasable programmable ROM (EEPROM, (Electrically EPROM)), random access memory (RAM, RAM, Random Access Memory) and other suitable storage media. Memory 1002 can be called "register", "cache", "Main memory (primary storage device)" and the like The memory 1002 is configured to store executable programs (program codes), software modules, and the like for realizing the radio communication method of the present embodiment.

[0155] The storage device 1003 is a computer-readable recording medium and may be constituted by, for example, at least one of the following: a floppy disk, a floppy disk (registered trademark), a magneto-optical disk (for example, a compact disk (eng. CD-ROM (Compact Disc ROM), etc.), digital versatile disc (DVD), Blu-ray disc (registered trademark), removable disc, hard disk drive, smart card, flash memory device ( for example, a card, memory card, and flash drive), magnetic stripe, database, server, or other suitable storage medium The storage device 1003 may be referred to as "secondary storage."

[0156] The communication device 1004 is a hardware (transmit / receive device) for enabling communication between computers via a wired and / or wireless network, and may be referred to as, for example, "network device", "network controller", "network card", "Communication module" and the like. Communication device 1004 may be configured to include a high frequency switch, duplexer, filter, frequency synthesizer, and the like. to implement, for example, frequency division duplex and / or time division duplex. For example, the above disclosed transceiver antennas 101 (201), amplification sections 102 (202), transmission / reception sections 103 (203), transmission line interface 106, and the like. can be implemented by communication device 1004.

[0157] Input device 1005 is a device that receives input from the outside (eg, keyboard, mouse, microphone, switch, button, sensor, and the like). The output device 1006 is a device capable of directing output data to the outside (eg, display, speaker, light emitting diode (LED, Light Emitting Diode), etc.). It should be noted that the input device 1005 and the output device 1006 may be formed in an integral structure (for example, a touch panel).

[0158] In addition, devices of these types, including a processor 1001, a memory 1002, and the like, are connected by a bus 1007 to transmit information. Bus 1007 can be a single bus or buses that differ from one device to another.

[0159] The radio base station 10 and user terminals 20 can also be structurally configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC ( Application Specific Integrated Circuit)), programmable logic device (PLD (Programmable Logic Device)), field programmable gate array (FPGA (Field Programmable Gate Array)), etc., while all functional blocks or part they can be implemented by means of the specified hardware. For example, processor 1001 may be implemented in at least one of these hardware.

(Terminology options)

[0160] It should be noted that the terms used in the present description, and / or terms necessary for its understanding, may be replaced by other terms bearing the same or similar meaning. For example, instead of the words “channels” and / or “symbols”, the word “signals” (“direction of signals”) can be used. In addition, the word “messages” can be used instead of the word “signals”. The phrase "reference signal" can be abbreviated to "OS" (RS, reference signal), and it can be called "pilot", "pilot signal", etc. depending on the applicable standard. In addition, the "elementary carrier" may be referred to as "cell", "carrier", "carrier frequency" and the like.

[0161] A radio frame can be formed by one or multiple slots (frames) in the time domain. Each slot or multiple slots (frames) forming a radio frame may be referred to as a “subframe”. A subframe can also be formed by one slot or multiple slots in the time domain. A subframe can have a fixed duration (eg, 1 millisecond) regardless of numerology.

[0162] In turn, a slot may be formed by one symbol or multiple symbols in the time domain (orthogonal frequency division multiplexing (OFDM), frequency division multiple access, single carrier (SC-FDMA), etc.)). A slot can also represent a unit of time, depending on the numerology. A slot can include many minislots. Each minislot can be formed by one symbol or multiple symbols in the time domain. A minislot may be referred to as a "subslot".

[0163] Each of the terms "radio frame", "subframe", "slot", "minislot" and "symbol" denotes a unit of time in signal transmission. Each of them may be referred to by other applicable terms. For example, one subframe may be referred to as a "transmission timeslot", a plurality of successive subframes may be referred to as a "transmission timeslot", one slot or one minislot may be referred to as a "transmission timeslot". That is, the subframe and / or transmission time interval may be a subframe (1 millisecond) in the conventional LTE system, an interval shorter than 1 millisecond (eg, 1 to 13 symbols), or an interval greater than 1 millisecond. It should be noted that the unit indicating the transmission time interval may be referred to as "slot", "minislot", and the like. instead of "subframe".

[0164] In this case, the transmission time interval means the minimum scheduling time unit, for example, in radio communication. For example, in LTE systems, the radio base station schedules the allocation of radio resources (eg, bandwidth and transmit power available to each user terminal) for the user terminal in units of a transmission slot. It should be noted that the definitions of the term "transmission time slot" are not limited to the above.

[0165] The transmission time slots can be transmission time units for channel-coded data packets (transport blocks, code blocks, and / or codewords), or a processing unit in scheduling, channel adaptation, and the like. It should be noted that if transmission time slots are given, the time slot (eg, number of symbols) to which transport blocks, code blocks, and / or codewords actually belong may be shorter than the indicated transmission time slots.

[0166] It should be noted that if one slot or one minislot is referred to as a "transmission timeslot," then one or more transmission timeslots (i.e., one or more slots or one or more minislots) may represent the minimum scheduling time unit. ... Moreover, you can control the number of slots (minislots) that make up this minimum scheduling time unit.

[0167] A transmission time interval (TTI) of 1 millisecond may be referred to as "normal transmission time interval" (transmission time interval in LTE Release 8-12 systems), "long transmission time interval", "normal subframe", "long subframe" and etc. A transmission time slot that is shorter than a normal transmission time slot may be referred to as "shortened transmission time slot", "short transmission time slot", "fractional or fractional transmission time slot", "shortened subframe", "short subframe", "minislot", "sub-slot" etc.

[0168] It should be noted that a long transmission time interval (for example, a normal transmission time interval, subframe, etc.) can be interpreted as a transmission time interval longer than 1 millisecond, and a short transmission time interval (for example, a shorter transmission time interval and etc.) - as a transmission time interval with a duration less than the duration of a long transmission time interval, which is not less than 1 millisecond.

[0169] A resource block (RB) is a unit of resource allocation in the time domain and frequency domain, which may include one or a plurality of consecutive subcarriers in the frequency domain. The resource block can also include one or multiple symbols in the time domain and be one slot, one minislot, one subframe, or one transmission timeslot in length. Both the transmission timeslot and one subframe may be constituted by one or multiple resource blocks. It should be noted that one or a plurality of resource blocks can be called "physical resource block" (PRB (Physical RB)), "sub-carrier group" (SCG, sub-carrier group), "resource elements group" (REG , resource element group), "pair of physical resource blocks", "pair of resource blocks", etc.

[0170] In addition, a resource block can be formed by one or a plurality of resource elements (RE, resource elements). For example, one resource element may correspond to a radio resource area of one subcarrier and one symbol.

[0171] It should be noted that the above-disclosed structures of radio frames, subframes, slots, minislots, symbols, and the like. serve as an example only. For example, such structures as the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and resource blocks included in a slot or minislot, the number of subcarriers included in a resource block, the number of symbols in transmission time interval, symbol length, cyclic prefix length, etc. can be varied.

[0172] In addition, information, parameters, and the like, referred to in the present description, may be represented by absolute values or relative values of certain values, or be represented as part of other relevant information. For example, radio resources can be designated with specific indices.

[0173] Names used for parameters and the like. in the present description are in no way limiting. For example, since the various channels (physical uplink control channel, physical downlink control channel, etc.) and information items may have any suitable names, such diverse names assigned to these various channels and information items are in no way limiting.

[0174] The information, signals, and the like disclosed herein can be implemented using a variety of technical solutions. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which can be referred to throughout the text of this description, can be characterized by parameters of voltage, current, electromagnetic waves or particles, optical fields or photons or any combination of them.

[0175] In addition, information, signals, and the like. can come from higher levels to lower levels and / or from lower levels to higher levels. Input and / or output of information, signals, etc. can occur through multiple network nodes.

[0176] Input and / or output information, signals, and the like. can be stored in a specific location (for example, in memory) or managed using a control table. Input and / or output information, signals, etc. can be overwritten, updated or added. Output information, signals, etc. can be deleted. Input information, signals, etc. can be transferred to other devices.

[0177] The communication of information is in no way limited to the aspects / embodiments disclosed herein, and other methods are possible. For example, the information message may be implemented by physical layer signals (e.g., downlink control information, uplink control information, higher layer signals (e.g., radio resource control signals, broadcast information (main information blocks, system information blocks, etc.), medium access control signals, etc.), as well as other signals and / or their combinations.

[0178] It should be noted that the physical layer signals may be referred to as “L1 / L2 control information (English Layer 1 / Layer 2, Layer 1 / Layer 2) (L1 / L2 control signals)”, “L1 control information (L1 control signal )" etc. The radio resource control signals can also be referred to as an "RRC message" and can be, for example, an RRCConnectionSetup message, an RRCConnectionReconfiguration message, etc. P. The communication of medium access control signals is possible, for example, by means of MAC control elements (MAC CEs, MAC control elements).

[0179] In addition, the communication of certain information (for example, the message "holds X") does not need to be explicit and can be carried out in an implicit form (for example, without communicating this specific information or reporting another piece of information).

[0180] Determination operations can be performed in values expressed as one bit (0 or 1), in boolean values "true or false", or by matching numerical values (eg, matching to a specific value).

[0181] Regardless of what terms are used to refer to software: "software", "firmware", "middleware", "microinstruction set" or "hardware description language", or other terms, they should be understood as broadly denoting instructions, instruction sets, code, code segments, program codes, programs, routines, software modules, application programs, application software, software packages, algorithms, routine routines, objects, executable files, streams executions, procedures, functions, etc.

[0182] Software, instructions, information, and the like. can also be sent and received using communications. For example, if the transfer of software from a website, server or other remote sources occurs using wired technical solutions (coaxial cables, fiber-optic cables, twisted-pair cables, digital subscriber lines (English digital subscriber lines, DSL) etc.) and / or wireless technical solutions (infrared radiation, microwaves, etc.), these wired and / or wireless technical solutions are also included in the concept of "communication means".

[0183] The terms "system" and "network" in the present description can be used interchangeably.

[0184] As used herein, the terms base station, radio base station, eNB, gNB, cell, sector, cell group, carrier, and elementary carrier may used synonymously. The base station may be referred to as “fixed station”, “NodeB”, “eNodeB (eNB)”, “access point”, “transmission point”, “receiving point”, “femtocell”, “small cell”, and the like.

[0185] The base station can accommodate one or many cells (eg, three) (also referred to as "sectors"). If the base station accommodates multiple cells, the total coverage area of the base station can be divided into several smaller areas, with each smaller area being able to provide communication service through the base station subsystems (for example, internal small base stations (RRHs (Remote Radio Heads)) The term "cell" or "sector" means a part of the coverage area or the total coverage area of a base station and / or base station subsystem providing communication services within a given coverage area.

[0186] As used herein, the terms “mobile station” (MS), “user terminal”, “user equipment” (UE), and “terminal” may be used synonymously. The base station may be referred to as “fixed station”, “NodeB”, “eNodeB (eNB)”, “access point”, “transmission point”, “receiving point”, “femtocell”, “small cell”, and the like.

[0187] A person skilled in the art may refer to a mobile station as a “subscriber station”, “mobile unit”, “subscriber unit”, “wireless unit”, “remote unit”, “mobile device”, “wireless device”, “wireless device” communication "," remote device "," mobile subscriber station "," access terminal "," mobile terminal "," wireless terminal "," remote terminal "," handset "," user agent "," mobile client " , "Customer" or, in some cases, any other suitable terms.

[0188] In addition, user terminals can be understood as radio base stations in the present description. For example, any aspect / embodiment of the present invention is applicable to a configuration in which, instead of communication between a radio base station and a user terminal, a plurality of user terminals (D2D (Device-to-Device)) are communicated. In this case, the user terminals 20 can perform the above-described functions of the radio base stations 10. In addition, expressions such as “upstream” and “downstream” can be interpreted as “straight” (“lateral”). For example, the expression "uplink" can be interpreted as "direct connection".

[0189] Similarly, user terminals in the present description can be understood as radio base stations. In this case, the radio base stations 10 can perform the functions of the user terminals 20 described above.

[0190] The actions disclosed herein as being performed by a base station may in some cases be performed by higher-level nodes. If the network contains one or many network nodes with base stations, it is obvious that various operations performed to communicate with terminals can be performed by base stations, one or more network nodes (mobility management nodes, serving gateways (English Serving-Gateways, S -GW), etc. are possible but not limiting examples) other than base stations, or combinations thereof.

[0191] The aspects / embodiments illustrated herein can be used singly or in combinations, with the ability to go from one to the other depending on the implementation method. The order of processes, sequences, flow diagrams, and the like, by way of examples of which aspects / embodiments are disclosed herein, may be reordered, provided that there is no conflict. For example, while several methods are illustrated herein with exemplary orders of their constituent steps, the specific orders illustrated herein are not limiting.

[0192] The aspects / embodiments illustrated herein are applicable to LTE, LTE-A, LTE-B (LTE-Beyond), SUPER 3G, IMT Advanced (IMT-Advanced), 4G (Mobile Communication System 4- 1st generation), 5G (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), NR (New Radio), NX (New radio access, New radio access), FX (Future generation radio access), GSM (registered trademark) (Global System for Mobile communications), CDMA 2000, UMB (Ultra Mobile Broadband) , Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (Registered Trademark)), IEEE 802.16 (WiMAX (Registered Trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (Registered Trademark) ), systems with other appropriate radio communication methods and / or systems next generation themes, enhanced from the above.

[0193] The expression "based on" in the context of the present description does not mean "based solely on", unless specifically indicated otherwise. In other words, the above expressions mean both "based solely on" and "based on at least".

[0194] In this document, the presence of any of the elements such definitions as "first", "second", etc., does not limit the total number or order of these elements. These definitions may serve herein for convenience only as a way to distinguish between two or more elements. Therefore, if we are talking about the first and second elements, this does not imply the possibility of using only two elements or that the first element necessarily precedes the second element in some way.

[0195] The expressions "making a decision", "evaluating" ("determining") in the context of this document can mean a variety of actions. For example, "making a decision" ("determining") "can be understood as making" assessments (definitions) "regarding the calculation, calculation, processing, derivation, study, search (for example, lookup in a table, database or any other data structures ), clarification, etc. In addition, these expressions can be interpreted to mean making "judgments (determination)" regarding reception (for example, receiving information), transmission (for example, transmitting information), input, output, evaluation (for example, evaluating data in memory), etc. P. In addition, these expressions in the context of this document can be interpreted as meaning "decision making" in relation to problem solving, selection, establishment, comparison, and the like. In other words, these expressions can be interpreted as meaning "decision making (determination)" about any action.

[0196] The words "connected" and "connected", or their variations, in the context of this document means any direct or indirect relationship or connection between two or more elements and may allow the presence of one or more intermediate elements between "connected" or "connected" with each other elements. The connection or connection between elements can be physical, logical, or both in some combination. For example, "communication" can mean "access".

[0197] In the present description, if two elements are connected, they can be considered "connected" or "connected" to each other by means of electrical wires and / or cables and / or printed electrical connections, and / or, in some non-limiting and non-exclusive examples, by means of electromagnetic energy with wavelengths in radio frequency regions, microwave regions, and / or optical regions (both visible and invisible), and / or the like.

[0198] As used herein, the expression "A and B are different" may mean that "A and B are different from each other." Expressions "separate", "connected", etc. can be interpreted in a similar way.

[0199] Expressions such as "including", "comprising" and their variations in the present description or in the claims have an inclusive meaning, in the same way as the word "provide", "provide" is used. In addition, the word "or" in the present description or in the claims is not used as an exclusive dividing union.

[0200] Finally, although the present invention is described in detail above, it should be obvious to a person skilled in the art that it is not limited to the embodiments disclosed herein. The present invention can be implemented with various adjustments and in various modifications without departing from the essence and scope of the present invention defined by the claims. Therefore, the disclosure in the present specification serves solely to illustrate examples and should under no circumstances be construed as limiting the present invention in any way.

Claims (10)

1. A radio communication terminal containing: a receiving section, configured to receive a downlink common channel that is scheduled by downlink control information; and a control section configured to control the transmission of a Hybrid Automatic Repeat Request (HARQ-ACK) acknowledgment based on slot information corresponding to a plurality of potential HARQ-ACK transmission intervals for the downlink common channel, and information about a slot configuration indicating the transmission direction of each slot, and it is provided that the control section may consider that the HARQ-ACK transmission interval indicated by the downlink control information is at least one of slots corresponding to a plurality of potential transmission intervals. 2. The radio terminal of claim 1, wherein the control section is configured to determine slot values corresponding to the plurality of potential transmission intervals based on higher level signals. 3. The radio terminal of claim 1 or 2, wherein the control section is configured to determine the bits of the codebook used for transmitting the HARQ-ACK based on the slot information and the slot configuration information. 4. A radio communication method containing steps in which: take the downlink common channel, which is scheduled by the downlink control information; and controlling the transmission of a Hybrid Automatic Repeat Request (HARQ-ACK) acknowledgment based on slot information corresponding to a plurality of potential HARQ-ACK transmission intervals for the downlink common channel and slot configuration information indicating the transmission direction each slot, wherein the HARQ-ACK acknowledgment transmission interval indicated by the downlink control information is at least one of slots corresponding to the plurality of potential transmission intervals.

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